Deformation and disintegration of solid polypropylene particles during their mechanochemical modification

The effect of a mechanochemical modification of PP with maleic anhydride, m aleic acid, and sodium maleate on the character of the deformation and disi ntegration of PP particles was studied by scanning electron microscopy. It was shown that the deformation and disintegration processes start from fine PP particles to spread to bigger ones as the duration and intensity of mec hanochemical modification of PP increase. In this case, changes in the morp hology and structure of PP particles are accompanied by an increase in the specific surface area, especially, at the final stage. Grafting a comonomer onto the polymer occurs via their joint deformation in all the particles p resent both at their surface and in the bulk.